# A349513 (b-file synthesized from sequence entry) 0 1 1 3 2 12 3 56 4 294 5 1722 6 11256 7 82224 8 670662 9 6084578 10 61030536 11 672041328 12 8067200092 13 104884001796 14 1468416141744 15 22026397243680 16 352422956979270 17 5991192602253810 18 107841475915703880 19 2048988077743637520 20 40979761692719279220 21 860574996085362738060